http://www.ringolab.com/note/daiya/archives/005136.html

http://gigazine.net/index.php?/news/comments/20071019_dainty_umbrella/

http://headlines.yahoo.co.jp/hl?a=20071020-00000066-jij-pol

http://headlines.yahoo.co.jp/hl?a=20071020-00000205-yom-soci

http://www.asahi.com/national/update/1019/TKY200710190440.html